"We have no idea what we did before Willow," says the singer, who'll perform at the MTV VMAs

By Marisa Laudadio
Updated September 06, 2012 01:00 PM
Credit: Andrew Macpherson

When she moved to Los Angeles 12 years ago, Pink was a very different person from who she is today.

“I was a delinquent,” the Pennsylvania-born singer-songwriter tells PEOPLE in its new issue. “An angry, rebellious, self-righteous, ambitious, crazy person who liked to have too much fun.”

And now? “We have no idea what we did before having Willow,” she says of her 15-month-old daughter with her husband (since 2006), motocross champ Carey Hart. “Having a child is the best thing that could happen.”

Pink, who turns 33 on Saturday – and performs on Thursday’s MTV Video Music Awards – didn’t know what would happen when she returned to the recording studio in January to work on her new album The Truth About Love, due out Sept. 18.

“Every time I make a new record I’m like, ‘I wonder if I can even sing or if I have anything to say,’ ” she says. “I mean, I’ve been changing diapers and having dinner parties, who does that? I don’t even know who I am!”

It turns out writing was like “turning on a faucet,” says the pop star – but just don’t expect lullabies about the joys of motherhood. Instead, fans will get more of the playful kiss-off songs the Grammy-winner’s fans have grown to love.

After all, says Pink, “I’m still nuts, and I’m still angry!”

For much more on Pink’s current life – including how she’s tackled the ups and downs of marriage, and how she got her body back after giving birth – pick up this week’s PEOPLE, on newsstands Friday